Dating rotograph postcards
During its nearly sixty year run, the Albertype Company produced over twenty-five thousand prints, which were distributed across the United States in the form of postcards and viewbooks.
The company had agents, including Adolph Wittemann, take photographs of different cities and regions, which were then reproduced as collotypes.
Collotypes were important to the industry of photographic reproductions because they were fairly cheap to produce, and their range of tones permitted exact reproductions of photographs through a photomechanical process.
They are also noted for their ability to accurately reproduce drawings, prints, and watercolors, and are still in limited use to this day.
Albertype Company Originally known as Wittemann Brothers, the Albertype Company was founded by brothers Adolph (1845-1938) and Herman L. The company operated from 1890 to 1952, and was located in Brooklyn, New York.The hardening of the gelatin resulted in less absorption in the areas which received the most light (those which will appear the darkest in the print).The plate was soaked in cold water, dried, and before printing it was wet again with a glycerine and water solution.Many publishers large and small printed cards though the Albertype Co.They were purchased by Art Vue Post Card Company in 1952.